Merge "msm: smmu: add re-route calling for specified iova."

{

	struct msm_smmu *smmu = to_msm_smmu(mmu);

	struct msm_smmu_client *client = msm_smmu_to_client(smmu);

	struct iommu_domain *domain;

	int ret;

	if (!client || !sgt)

		return -EINVAL;

	if (iova != 0) {

		if (!client->mmu_mapping || !client->mmu_mapping->domain)

			return -EINVAL;

		domain = client->mmu_mapping->domain;

		return iommu_map_sg(domain, iova, sgt->sgl,

					sgt->nents, flags);

	} else {

		if (priv)

		ret = msm_dma_map_sg_lazy(client->dev, sgt->sgl, sgt->nents,

			DMA_BIDIRECTIONAL, priv);

			ret = msm_dma_map_sg_lazy(client->dev, sgt->sgl,

					sgt->nents, DMA_BIDIRECTIONAL, priv);

		else

			ret = dma_map_sg(client->dev, sgt->sgl, sgt->nents,

				DMA_BIDIRECTIONAL);

		return (ret != sgt->nents) ? -ENOMEM : 0;

	}

}

static void msm_smmu_unmap(struct msm_mmu *mmu, uint64_t iova,

		struct sg_table *sgt, void *priv)

{

	struct msm_smmu *smmu = to_msm_smmu(mmu);

	struct msm_smmu_client *client = msm_smmu_to_client(smmu);

	struct iommu_domain *domain = client->mmu_mapping->domain;

	struct scatterlist *sg;

	size_t len = 0;

	int unmapped, i = 0;

	if (iova != 0) {

		for_each_sg(sgt->sgl, sg, sgt->nents, i)

			len += sg->length;

		unmapped = iommu_unmap(domain, iova, len);

		if (unmapped < len)

			dev_warn(mmu->dev,

				"could not unmap iova@%llx\n", iova);

	} else {

		if (priv)

		msm_dma_unmap_sg(client->dev, sgt->sgl, sgt->nents,

			DMA_BIDIRECTIONAL, priv);

			msm_dma_unmap_sg(client->dev, sgt->sgl,

				sgt->nents, DMA_BIDIRECTIONAL, priv);

		else

			dma_unmap_sg(client->dev, sgt->sgl, sgt->nents,

				DMA_BIDIRECTIONAL);

	}

}

static void msm_smmu_destroy(struct msm_mmu *mmu)

{